113 results about "Thermal transition" patented technology

The present invention is directed to bioabsorbable self-expanding medical devices for use inside or outside body conduits that self-expand at, or below, normal human body temperature without requisite for a polymeric thermal transition

A method of sequentially transitioning a thermally active shape memory device progressively translocates the thermally active shape memory device through a first controlled temperature zone and through an additional controlled temperature zone. The thermally active shape memory device is thermally transitioned and changed in geometric shape as a result of thermal communication of the shape memory device with either or both of the controlled temperature zones to produce a transitioned thermally active shape memory device. Novel devices produced according to the method are also disclosed.

The invention relates to a thermal conversion method and a thermal conversion device of solid fuel, wherein the thermal conversion of the solid fuel is composed of three independent and association-controllable sub-processes of pyrolysis, gasification and burning by decoupling the integrated pyrolysis, gasification and burning reactions in the conventional thermal conversion process. A hot carrier substance is circulated among the sub-processes, so that the burning sub-process provides reactive heat to the pyrolysis and the gasification sub-processes and simultaneously provides oxygen to the gasification process to initiate internal burning so as to compensate for the gasification reaction heat that the hot carrier substance is unlikely to supply. Accordingly, the thermal conversion method can control the three thermochemical reactions of pyrolysis, gasification and burning by decoupling, recombination and association to achieve combined production of pyrolysis oil, synthesis gas and heat. Different from conventional single conversion devices for burning, gasification and pyrolysis, the thermal conversion method of the invention has the advantages of compact structure, high heat utilization efficiency and greatly reduced oxygen consumption for synthesis gas production, thus achieving high-value comprehensive conversion and utilization of solid fuels such as brown coal, bituminous coal and biomass.

Inventions described herein generally relate a process for contacting a polymeric feed with one or more inorganic salt catalysts to produce a total product comprising a liquid product and, in some embodiments, non-condensable gas. In some embodiments, the inorganic salt catalyst exhibits an emitted gas inflection of an emitted gas in a temperature range between 50° C. and 500° C., as determined by Temporal Analysis of Products. In some embodiments, the inorganic salt catalyst has a heat transition in a temperature range between 200° C. and 500° C., as determined by differential scanning calorimetry (DSC), at a rate of 10° C. per minute. Inventions described herein also generally relate to compositions that have novel combinations of components therein.

A seat assembly includes a seat fabric, wherein at least a portion of the seat fabric comprises a yarn comprising a shape memory polymer adapted to undergo a change in a modulus of elasticity at a thermal transition temperature; a support material upon which the seat fabric is disposed; and a controller in operative communication with the shape memory polymer, wherein the controller is operable to selectively apply a thermal activation signal to the shape memory polymer to effect a change in the modulus of elasticity of the shape memory polymer, wherein the change in the modulus of elasticity of the shape memory polymer results in a change in a stiffness and/or flexibility of the seat fabric.

Shape memory polymers featuring reversible actuation capability under ambient stimulus for integration with apparel. One approach is to use a multiblock polymer consisting of two (or potentially more) blocks in which the one block is the crystalline switching block with relatively low melting transitions, the other block has a higher thermal transition, and the two blocks are linked together by a linker molecule. Another approach is to use a graft copolymer having high and low melting transitions where the graft copolymer has a first polymer serving as cool heat the backbone and a second polymer being grafted to or from the backbone at certain graft locations. A further approach is to use latent crosslinking of a semicrystalline polymer with reactive groups placed on the backbone. Finally, these polymers may be formed as actuators that undergo curling, twisting and even volumetric expansion.

A temperature sensing device includes two or more strips, wherein each of the two or more strips comprises a shape memory polymer adapted to undergo a change in a modulus of elasticity at a thermal transition temperature. A method comprises contacting two or more strips with an item, wherein each strip comprises a shape memory polymer adapted to undergo a change in a modulus of elasticity at a thermal transition temperature; equilibrating the two or more strips with the item; and determining a temperature range of the item by observing whether any of the two or more strips underwent a decrease in stiffness and/or increase in flexibility caused by the change in the modulus of elasticity of the shape memory polymer.

The subject matter described herein relates to thermoresponsive switching materials that undergo a thermal transition over a narrow temperature range and to devices, such as actuators, indicators, and sensors, prepared from such compositions

The invention discloses a polyester fibre and blended dye cleaner and application, which comprises the following parts: castor oil oxirane condensate, isomeric tridecaliphatic alcohol polyoxyethylene ether, Na2SiO3, polycarboxylate derivative, PVP and citrate. The invention can realize one-bath dyeing, detergent and washing to save manufacturing time, water, energy, steam and adjuvant, which improves the thermal transition washing staining fastness by 1-2 grade to improve the product quality.

The invention discloses a method for preparing a low temperature fused salt of an aporate high crystallization magnesium borate crystal whisker by means of a thermal transition, which belongs to the field of inorganic chemical engineering technology. A hydrothermal product alkali magnesium borate crystal whisker is used by the method as a precursor, roasted for 1-5 hours in an air atmosphere of 600-750<DEG C> with an assistance of minim inorganic fused salt, washed, filtered, and dried, thus obtaining the aporate high crystallization magnesium borate crystal whisker with a length of 0.5-20mum, a diameter of 10-100nm, a slenderness ratio of 10-200, and the main content of the aporate high crystallization magnesium borate crystal whisker is bigger than 98 percent. The method has the advantages that raw materials of the invention are cheap and easy to get; the craftwork is simple; the condition is mild; added value of the product is high; an industrialized popularization is easy; the feature of the prepared magnesium borate crystal whisker is regular; the dispersion is good, no holes exists; the crystallization degree is high; an application to industries of magnesium/aluminium alloy, plastics, rubber, and pottery, and the like, as reinforcing material is hopeful.

The invention relates to an organic phase stabilization, phase transition and energy storage material and a preparation method thereof. The organic phase stabilization, phase transition and energy storage material comprises 30-90wt% of an organic solid-liquid phase transition and energy storage material and 10-70wt% of an organic polymeric phase stabilization and phase transition supporting material. The organic solid-liquid phase transition and energy storage material is introduced into the polymeric phase stabilization and phase transition supporting material in order to make the organic phase stabilization, phase transition and energy storage material have good energy storage performance, adjustable phase transition temperature and high phase transition enthalpy; and when B in the polymeric phase stabilization and phase transition supporting material is an azo structure, anthraquinone, naphthalene amide and pyrene amide, the organic phase stabilization, phase transition and energy storage material can absorb visible light, and realizes photo-thermal transition and storage. The organic phase stabilization, phase transition and energy storage material has the advantages of simple synthesis process, convenient application, and wide application prospect.

A method for fusing a pair of insulated wires to one another, and a fused wire made by such method, in which the combined or major diameter of the fused wire equals, or very closely matches, the sum of the diameters of the individual wires prior to fusion. In the present method, a pair of wires, each having a coating of insulation that is substantially fully cured, are brought into close abutting contact with one another along a line contact, and thereafter pass through a heating device which heats the coatings above their a thermal transition point of at least one of the pair of wires to fuse the coatings of the wires together along the line contact.

A valve gated hot runner nozzle with at least two transition members made of different materials located between a nozzle tip and a mold gate component to provide a thermal transition region. A first transition member in contact with the nozzle tip is less thermally conductive than a second transition member in contact with the mold gate component. The valve pin when in the closed position makes sealing contact with at least the second transition member such that cooling from the mold gate component is transferred to the valve pin to cool the melt in the mold gate area.

The invention provides a method for producing gas by oxygen enrichment and thermolysis of organic solid wastes. The organic solid wastes take enriched oxygen and water vapor as gasified media in a gasification furnace; in the anoxic atmosphere, part of organic solid wastes are subjected to anoxic combustion to provide heat, wherein one part of heat is used as a hot source for generating water vapor and the other part of heat is used for gasifying residual substances to generate gasification gas; the gasification gas whirls in a high-temperature furnace body, stays for over 3s and can be used for effectively decomposing contaminants. The gasification gas is subjected to high-temperature catalytic reforming before entering a gasification gas outlet; alkaline matters are sprayed in a gasification gas outlet pipeline; and finally, the gasification gas enters a dust collector cyclone for desorbing solid particles. Compared with other thermal transition systems, the method can be used for realizing the secondary pollution-free emission, has high quality of converted products and a wide application prospect and is suitable for large-scale popularization and application.

The invention discloses a transparent dielectric paste, comprising an organic carrier and inorganic glass powder dispersed in the organic carrier, wherein the mass ratio of the inorganic glass powder to the organic carrier is 60:40-90:10; the inorganic glass powder comprises PbO, B2O and SiO2 based on the mass ratio of 60-80:6-15:10-30; and the organic carrier comprises an organic solvent with the boiling point of 150-300 DEG C and a resin with the decomposition temperature of 200-350 DEG C, and the mass ratio of the organic solvent to the resin is 85:15-97:3. The transparent dielectric paste provided by the invention is formed by evenly dispersing the inorganic glass powder with insulating performance in an organic medium. The transparent dielectric paste can form a transparent dielectric layer which has high transmittance and surface flatness, proper thermal transition temperature and thermal expansion coefficient matched with substrate glass.

The invention discloses a co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis, and belongs to the technical field of biomass energy sources. For the problems that in current lignin thermal transition research, a process is harsh and complex, transition is insufficient, lignin thermal transition by-products are not well utilized, and the like, the method can be used to obtain the monophenol compound with high yield and meanwhile co-produce the activated carbon with high specific surface area, the process is simplified, and recycling transformation and multistage utilization of lignin are facilitated.

Absorbable, multiphasic, crystalline, solid blend compositions having at least two first order thermal transitions, are formed of a segmented l-lactide copolymer as the principal or major component and at least one additional crystalline thermoplastic absorbable polyester having glycolide-based sequences, a fraction of which participated in ester-ester interchange reactions with lactide-based sequences to produce crystalline materials with modulated properties for use in producing orthopedic and tissue-repair devices.

The invention discloses a polymer with a triple shape memory effect and a preparation method of the polymer. The polymer is of the following structures: (a) the polymer is of a crosslinking network structure containing two separated regions in a system, and the two separated phases have independent thermal transition temperatures; (b) the thermal transition temperatures of the two phases can be freely regulated and controlled, and a difference value between the thermal transition temperatures of the two phases in the same system is greater than or equal to 20 DEG C; (c) the polymer can be obtained by chemically thermal crosslinking of an acrylic acid system or a polyurethane system. The polymer prepared through the preparation method is of the crosslinking structure containing the two obviously separated regions and has the triple shape memory effect for fixing and recovering two independent temporary shapes; furthermore, the transition temperatures of the two phases can be freely regulated and controlled within an extremely large range, so that complicated diversified deformations at different temperatures can be met.

The present application provides a lithium ion battery including a thermal sensitive layer comprising polymer particles. The thermal sensitive layer may be disposed between the electrodes and the separator. When the lithium ion battery is under thermal runaway condition and the internal temperature rises to a critical temperature, the polymer particles undergo a thermal transition process (melting) to form an insulating barrier on the electrodes, which blocks lithium ion transfer between the electrodes and shuts down the internal current of the battery.

The invention relates to a mild hydrothermal-thermal transition preparation method for high-draw-ratio hydrated and anhydrous calcium borate nanowhisker and belongs to the technical field of chemical new materials. The method comprises the steps of mixing a calcium compound and a boron compound with water, conducting thermal treatment in a water bath at 40-70 DEG C for 5-20 min, adding inorganic base solution to calcium-boron mixed liquor dropwise, and continuing thermal treatment in a water bath at 50-90 DEG C for 10-50 min, so that precursor size is obtained; placing the precursor size in a hydrothermal reaction kettle, and increasing temperature to 120-240 DEG C for thermostatic reaction for 2.0-18.0 h, so that a hydrated calcium borate nanowhisker wet product is obtained. The high-draw-ratio hydrated calcium borate (Ca2B2O5-H2O) nanowhisker high in purity and crystallinity degree is synthesized with the mild hydrothermal method for the first time, then phase transformation is achieved through medium temperature roast thermal transition for crystal water removal to obtain high-draw-ratio anhydrous calcium borate (Ca2B2O5) nanowhisker high in purity and crystallinity degree and staying in good morphology, and then controllable synthesis of the high-draw-ratio 1D calcium borate nanowhisker is achieved.

The invention discloses a semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, a preparation method and a purpose thereof. The method comprises the following steps: 1) employing cellulose nitrate to prepare a semi-permeable membrane precursor solution; 2) adding the chalcogenide to the above precursor solution, violently stirring the materials to obtain a mixed solution; 3) spreading the above mixed solution on a container having a flat bottom, naturally drying the solution to form the membrane, and preparing the chalcogenide-containing semi-permeable membrane; 4) placing the chalcogenide-containing composite semi-permeable membrane in a silver nitrate solution for immersing for a while; and 5) taking the immersed chalcogenide-containing semi-permeable membrane out, naturally drying the material, and preparing the semiconductor chalcogenide-containing semi-permeable membrane. The method has the advantages of simple process and low cost; the provided semi-permeable membrane has good photo-thermal transition effect, and has very good application prospect in the fields of water evaporation by light and seawater desalination.

A detachable superconducting lead includes a vacuum-sealed thermal transition through which a stabilized conductor passes. Two identical leads are attached and surrounded by a sealed Dewar and allowed to cool either naturally or by way of a cooling element. Detaching the leads requires the joint to be heated up by a heat transfer unit or by a heat gun after the Dewar is removed. Once warmed, the lead can be disassembled with tooling appropriate to the joint. In many instances, regular fasteners can be used. Removable Dewars may be constructed with insulation (including vacuum) using O-rings and flanges.